// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_WEBSOCKETS_WEBSOCKET_EXTENSION_H_
#define NET_WEBSOCKETS_WEBSOCKET_EXTENSION_H_

#include <string>
#include <vector>

#include "net/base/net_export.h"

namespace net {

// A WebSocketExtension instance represents a WebSocket extension specified
// in RFC6455.
class NET_EXPORT_PRIVATE WebSocketExtension {
public:
    // Note that RFC6455 does not allow a parameter with an empty value.
    class NET_EXPORT_PRIVATE Parameter {
    public:
        // Construct a parameter which does not have a value.
        explicit Parameter(const std::string& name);
        // Construct a parameter with a non-empty value.
        Parameter(const std::string& name, const std::string& value);

        bool HasValue() const { return !value_.empty(); }
        const std::string& name() const { return name_; }
        const std::string& value() const { return value_; }
        bool Equals(const Parameter& other) const;

        // The default copy constructor and the assignment operator are defined:
        // we need them.
    private:
        std::string name_;
        std::string value_;
    };

    WebSocketExtension();
    explicit WebSocketExtension(const std::string& name);
    WebSocketExtension(const WebSocketExtension& other);
    ~WebSocketExtension();

    void Add(const Parameter& parameter) { parameters_.push_back(parameter); }
    const std::string& name() const { return name_; }
    const std::vector<Parameter>& parameters() const { return parameters_; }
    bool Equals(const WebSocketExtension& other) const;
    std::string ToString() const;

    // The default copy constructor and the assignment operator are defined:
    // we need them.
private:
    std::string name_;
    std::vector<Parameter> parameters_;
};

} // namespace net

#endif // NET_WEBSOCKETS_WEBSOCKET_EXTENSION_H_
